Why are object properties marked read-only in my JavaScript (Vue) code?

I have a Vue2 application that has a state variable (an array containing box objects) called boxes. I have a computed property that extracts a subset of these boxes (nearest_box_linked_boxes). I have a method that iterates through the boxes returned by nearest_box_linked_boxes and changes the value ...

P粉464208937 2023-08-26 22:18:27 0  1  576

css - Mobile font will become larger after adding overflow-y:scroll to the box

After adding the css attribute: overflow-y:scroll to the outermost box, when viewing it on the Google mobile simulator, the font will automatically become larger and the overall layout will be rem. After removing this attribute, the font becomes normal. I want to know what the problem is. Code 1: No...

黄舟 2017-05-16 13:39:31 0  5  1067

php - Why does subclass overriding parent class properties and methods not override parent class properties and methods?

1. Since inheritance is passed by reference, why does the subclass rewrite the properties and methods of the parent class not change the properties and methods of the parent class. What does inherited reference transfer mean? Under what circumstances will the member methods and member properties of ...

PHP中文网 2017-05-16 13:11:34 0  8  1121

Why does changing the font size of a child element cause the flex container to deviate from its original position?

This problem is very strange, it behaves differently on normal containers and flexboxes. Why does it change the height of the container when changing the font size of the first child element? For a flexible box, why does it move down or up a certain distance? How can I solve this problem? I want the...

P粉186897465 2023-07-23 15:17:08 0  2  622

javascript - Under what circumstances is the echarts attribute barCategoryGap used?

1.Under what circumstances is the echarts attribute barCategoryGap used? 2. How to fix the category width? The first problem to be solved is the category width of the bar chart-category chart (note that it is not the column height, the column height is barWidth, I know it). Under normal circumstance...

给我你的怀抱 2017-06-26 10:51:59 0  1  1690

Update the calculated properties of a parent component after the child component modifies the prop data

I need to make a relatively complex API request object with a large number of UI components responsible for updating different properties of the object. I pass the basic request model as a prop from the parent component to its child components, and the child components pass it to their components (a...

P粉633733146 2024-02-26 11:56:21 0  1  357

class - How does PHP implement that all subclass attributes have toArray() method?

How to implement in PHP that all properties of subclasses have toArray() method? After the call, it becomes an array. How to design the parent class? ?

阿神 2017-05-16 12:59:22 0  3  581

Firebase Firestore where operator uses nested dynamic properties

Using the model below, I need to use the where operator when querying Firestore. However, the where attribute is nested based on the following variable code: where("category","==","Something"), model constlanguage="EN"{EN:{category:"Somethinginenglish&quo...

P粉052686710 2023-09-08 16:06:57 0  1  568

Correctly use elastic properties to nest elastic containers

I'm having some issues using flexbox correctly and would like some clarification on the nesting of parent and child elements. I know that child elements inherit the flex property of the parent element, but what happens to further descendant elements (e.g. "grandchildren")? What is the corr...

P粉369196603 2023-08-24 11:43:49 0  1  439

How to set the attributes of multiple subitems of v-treeview

Suppose I have variable items with the following structure: [{id:1,name:'value1',item_nested:[{id:2,name:'value2',},{id:3,name:'value3',nested_item: [{id:4,name:'value4'}]}]}] In v-treeview we have a props called item-children which accepts a string which allows to set which property will be referen...

P粉852578075 2023-08-28 10:06:59 0  1  594

javascript - JS inheritance, how to avoid the situation where the object type attribute of the parent class prototype will be affected by the subclass;

Parent is the parent class, and child inherits parent. When the sex value of the child instance is modified, it will cause the sex of the parent and other subclass instances to change; whether this type of object type attributes can only be placed in the constructor, or whether it is agreed upon All...

过去多啦不再A梦 2017-06-30 09:59:00 0  4  916

How to position the website box on the right

I've got a problem here, I'm trying to put a box on the right side of the website but don't know why it's not working, I've tried using justify-content:flex-end; to align the box to the "end" of the page, Then added padding-right to 200px, but alas this didn't work. Any help with explanati...

P粉953231781 2023-08-14 19:16:04 0  1  665

javascript - In the vue-cli project, can sub-components dynamically change the meta attributes in routes?

If you want to change the title of WeChat through the title attribute set in the route's meta, and if you want to get the product details in the product details section, you need to dynamically get the title attribute of the route's meta in the sub-component and change it. Is this possible? ?

学习ing 2017-07-05 10:38:30 0  1  895

What does it mean in HTML 5 when an attribute is a boolean?

What does it mean when a property like a hidden property is a boolean property? Can someone explain it in layman's terms?

P粉232793765 2023-10-20 18:43:19 0  1  899

Unable to set attribute disable to button

In the code shown below, I am developing a child component in which I have created a button and want to add the disable attribute. Given the code below, the disable property is underlined in red and the error message says: Type '"isDigitizePolygonDisabled"' cannot be assigned to type 'Bool...

P粉039633152 2023-08-16 20:54:18 0  1  528

How to translate component attributes/properties using Vue I18n

How to translate incoming properties/properties of a component? For example, I have a card component with title and description properties defined. <!--my-card component--><template><div><h2>{{title}}</h2><span>{{description}}</span></div></template...

P粉416996828 2023-11-07 12:47:10 0  2  679

[Must-read for front-end job hunting] Selected front-end development interview questions and answers_CSS

CSS: Introduce the CSS box model? (1) There are two types, IE box model and standard W3C box model; the content part of IE includes border and padding; (2) Box model: content, padding, margin, border ).What are the CSS selectors? What properties can be inherited? How is the priority algorithm calcul...

天蓬老师 2017-11-13 13:03:00 0  1  1892